Stopper



FIG. 1 is a top perspective view of the stopper showing my new design;

FIG. 2 is a front elevation view of the stopper of FIG. 1 , the rear, right side, and left side elevation views being identical thereof;

FIG. 3 is a top view of the stopper of FIG. 1 ;

FIG. 4 is a bottom view of the stopper of FIG. 1 ; and,

FIG. 5 is a bottom perspective view of the stopper of FIG. 1 . 

CLAIM The ornamental design for a stopper, as shown and described. 